Non-linear analysis of a modified QPSK Costas loop
Kuznetsov, N. V., Blagov, M. V., Kudryashova, E. V., Ladvanszky, J., Yuldashev, M. V., & Yuldashev, R. V. (2019). Non-linear analysis of a modified QPSK Costas loop. In L. Jadachowski (Ed.), 11th IFAC Symposium on Nonlinear Control Systems NOLCOS 2019 Vienna, Austria, 4-6 September 2019 (52, pp. 31-35). IFAC; Elsevier. IFAC-PapersOnLine. https://doi.org/10.1016/j.ifacol.2019.11.751
© 2019 IFAC
A Costas loop is one of the classical phase-locked loop based circuits, which demodulates data and recovers carrier from the input signal. The Costas loop is essentially a nonlinear control system and its nonlinear analysis is a challenging task. In this article for a modified QPSK Costas loop we analyze the hold-in, pull-in and lock-in ranges. New procedure for estimation of the lock-in range is considered and compared with previously known approach.
ConferenceIFAC Symposium on Nonlinear Control Systems
Is part of publication11th IFAC Symposium on Nonlinear Control Systems NOLCOS 2019 Vienna, Austria, 4-6 September 2019
Publication in research information system
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Additional information about fundingWe acknowledge support from Russian Science Foundation project 19-41-02002
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